Lens adapter



FIG. 1 is a front, right, and top perspective view of a lens adapter showing my new design;

FIG. 2 is a front elevation view of thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof, and,

FIG. 7 is a bottom view thereof.

The broken (dashed) lines show portions of the lens adapter that form no part of the claimed design. 

CLAIM The ornamental design for a lens adapter, as shown and described. 